CN107445327B - Integrated device and method for treating sewage through hydraulic collaborative flotation - Google Patents
Integrated device and method for treating sewage through hydraulic collaborative flotation Download PDFInfo
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- CN107445327B CN107445327B CN201610362908.6A CN201610362908A CN107445327B CN 107445327 B CN107445327 B CN 107445327B CN 201610362908 A CN201610362908 A CN 201610362908A CN 107445327 B CN107445327 B CN 107445327B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The invention discloses an integrated device and method for treating sewage by hydraulic collaborative flotation. The device consists of a hydraulic separation area and a flotation area; the hydraulic separation area mainly comprises a tangential inlet water inlet pipe, a rotational flow cavity, an overflow pipe, a rotational flow cylinder, a sand collection area, a solid-rich phase outlet pipe and the like from top to bottom, and large-particle solid matters are separated from water under the action of water power; the flotation zone is positioned at the upper part of the hydraulic separation zone and mainly comprises a bearing tray, a releaser, a scum zone and the like from bottom to top; the scum area is provided with a guide plate and an oil overflow weir for collecting scum; the outer ring of the scum zone is provided with an effluent weir used for discharging purified water. The integrated device for treating sewage by hydraulic collaborative flotation has obvious effects of sand removal, turbidity reduction, solid-liquid separation and the like in the field of water treatment, and has the advantages of high integration level, compact structure, small occupied area, high automation degree, simplicity and convenience in operation, convenience in movement and transportation, high treatment speed and low energy consumption.
Description
Technical Field
The invention relates to the field of solid-liquid-gas separation, in particular to an integrated device and a method for treating sewage by hydraulic collaborative flotation.
Background
Solid particles with large specific gravity, such as mud and sand, are inevitably mixed in the migration, flow and collection processes of the wastewater, and suspended particles contained in the wastewater cause inconsistent specific gravity of the solid particles contained in the wastewater. In addition, the waste water often contains oil substances to a certain degree, so that the early pretreatment stage is particularly important, and suspended particles and oil components in the water are firstly removed, and then the subsequent treatment process can be carried out. If the pretreatment effect is not good, not only the subsequent biochemical treatment and the advanced treatment are influenced, but also certain damage is caused to pipelines, equipment, valve pipes and the like.
At present, the common large-particle sand removing device in the market is difficult to treat lighter suspended matters or oil droplets, the device mainly controls the flow state and the flow rate of water flow by using mechanical force, accelerates the precipitation of particles and takes away organic matters along with the water flow, and although the sand removing efficiency is greatly improved, the device still needs facilities such as mechanical force stirring and the like, so the energy consumption is also higher. Meanwhile, for removing fine particles, light suspended matters and oil stains in the wastewater are easily supported to the liquid level by the micro-bubbles and discharged from the high position of the facility, but the heavy suspended matters are difficult to be supported to the liquid level by the micro-bubbles, so that the separated water is mixed with the heavy suspended matters. The solid-liquid separation technology in the existing water treatment industry can not simultaneously and effectively remove suspended particles, oil components and the like with different specific gravities in water, and the effect of pre-treating effluent at the early stage is poor. There is a need in the art for a highly efficient, low energy consuming technology and products that can be used as a pretreatment for such wastewater to remove silt and organic suspended particles from the water.
Disclosure of Invention
The invention aims to solve the problem of providing an integrated device and a method for treating sewage by hydraulic collaborative flotation on the basis of the existing treatment technology and aiming at the defects of the existing technology. The integrated device for treating sewage by hydraulic collaborative flotation is manufactured by utilizing the cyclone centrifugal action according to solid particles in fluid, integrates the hydraulic centrifugal separation and the gas flotation into a whole, and has obvious effects of sand removal, turbidity reduction, solid-liquid separation and the like in the field of water treatment.
The technical scheme adopted by the invention is as follows:
an integrated device and a method for treating sewage by hydraulic collaborative flotation are characterized by comprising the following steps: the device consists of a hydraulic separation area and a flotation area, wherein the flotation area is positioned at the upper part of the hydraulic separation area.
Further, the integrated device for treating sewage by hydraulic collaborative flotation of the invention can also have the following characteristics: the hydraulic separation zone mainly comprises a tangential inlet water inlet pipe, a rotational flow cavity, a rotational flow cylinder, an overflow pipe, a sand collection zone, a mud valve, a solid-rich phase outlet pipe and an overflow port from top to bottom; the cyclone cavity is arranged at the upper part of the hydraulic separation area; the cyclone cylinder is arranged at the lower part of the hydraulic separation area; the bottom of the cyclone cylinder body is connected with a solid-rich phase outlet pipe; the tangential inlet water inlet pipe is arranged outside the cyclone cavity and is tightly connected with the cyclone cavity; the overflow pipe is arranged in the middle of the top of the hydraulic separation area; the overflow port is arranged at the outlet of the overflow pipe and is positioned at the bottom of the flotation area.
Further, the integrated device for treating sewage by hydraulic collaborative flotation of the invention can also have the following characteristics: the flotation area mainly comprises a bearing tray, a releaser, a scum area and the like from bottom to top; the releaser is arranged in the bearing tray; the scum area is provided with a guide plate and an oil overflow weir for collecting scum; the outer ring of the scum zone is provided with an effluent weir used for discharging purified water; and an air duct is arranged at the top of the scum area.
Further, the integrated device for treating sewage by hydraulic collaborative flotation of the invention can also have the following characteristics: the method comprises the following steps that (1) sewage containing solid particles enters a hydraulic separation area through a tangential inlet water inlet pipe after being boosted by a water pump, and is separated into a solid-rich phase and a liquid phase through a liquid-solid cyclone separation process; the solid-rich phase is discharged from a solid-rich phase outlet pipe at the bottom of the hydraulic separation area, and the discharged solid-rich phase sludge is concentrated and recycled; the liquid phase overflows from the overflow pipe and enters the flotation area.
Further, the integrated device for treating sewage by hydraulic collaborative flotation of the invention can also have the following characteristics: the liquid phase overflows from an overflow pipe in the hydraulic separation area and then enters a flotation area, suspended and floating solid particles with density smaller than that of water in the liquid phase are floated under the action of a releaser, and volatile substances in the water can be blown out by dissolved air; the floated organic pollutants enter a scum area through a guide plate and then are discharged out of scum through an oil overflow weir; the purified liquid after flotation is finally discharged outside through an effluent weir; the volatile substances in the water are discharged from the vent pipe.
Further, the integrated device for treating sewage by hydraulic collaborative flotation of the invention can also have the following characteristics: the sewage containing solid particles and the aggregating agent enter the cyclone separator together, and the aggregating agent and the solid particles are effectively reacted and combined, so that the removal efficiency of the solid particles in the water is improved.
Further, the integrated device for treating sewage by hydraulic collaborative flotation of the invention can also have the following characteristics: the device appearance is the cylinder, and the middle part is intake, and upper portion goes out water.
Further, the integrated device for treating sewage by hydraulic collaborative flotation of the invention can also have the following characteristics: the device can be used in series or in parallel according to the condition of the sewage quality.
The invention has the beneficial effects that:
compared with the prior art, the integrated device for treating sewage through hydraulic collaborative flotation provided by the invention utilizes the rotational flow centrifugal action of fluid to perform solid-liquid screening, separates out large-particle substances in water, and further separates out substances such as oil and fine particles in water through the bubble flotation action, so that better separation effect can be realized for solid particles with different particle size ranges and properties in water. The device integrates hydraulic separation and flotation, realizes the effects of sand removal, turbidity reduction, solid-liquid separation and the like in the field of water treatment, adds a targeted aggregating agent to pollutants which are not easy to settle and coalesce in liquid, and can promote the mixing, flocculation, coalescence or settlement of the pollutants, thereby effectively improving the process of preliminary solid-liquid separation of sewage, improving the operation severity of the device and effectively improving the solid-liquid separation efficiency. In addition, the equipment device is suitable for pretreatment of various waste waters, and has the advantages of high integration level, compact structure, small occupied area, high automation degree, simple and convenient operation, convenient transportation, high treatment speed and low energy consumption.
Drawings
FIG. 1 is a schematic diagram of an integrated apparatus for treating sewage by hydraulic co-flotation according to the present invention;
reference numerals:
1-a tangential inlet water inlet pipe; 2-a rotational flow cavity; 3-a rotational flow cylinder; 4-a sand collecting area; 5-a mud valve; 6-a solid phase rich outlet pipe; 7-an overflow pipe; 8-an overflow port; 9-releaser; 10-an aeration disc; 11-a scum zone; 12-a deflector; 13-an oil overflow weir; 14-an effluent weir; 15-an air duct; 16-a flotation area; 17-hydraulic separation zone.
Detailed Description
Example 1
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings and detailed description.
FIG. 1 is a schematic diagram of an integrated device for treating sewage by hydraulic collaborative flotation according to the invention.
As shown in figure 1, the invention provides an integrated device and a method for treating sewage by hydraulic collaborative flotation, wherein the integrated device for treating sewage by hydraulic collaborative flotation mainly comprises a hydraulic separation zone 17 and a flotation zone 16.
The integrated device for treating sewage by hydraulic collaborative flotation comprises a flotation zone 16 and a hydraulic separation zone 17. Wherein, the releaser 9 is arranged in the bearing tray 10; the supporting tray 10 is arranged on the upper side of the overflow port 8; the guide plate 12 is arranged inside the flotation area; the oil overflow weir 13 is arranged on the upper side of the guide plate 12; the effluent weir 14 is arranged on one side of the outer circumference in the flotation zone; the cyclone cavity 2 is arranged in the middle of the hydraulic separation area 17; the cyclone cylinder 3 is arranged at the lower part of the hydraulic separation area 17; the lower part of the cyclone cylinder 3 is connected with a solid-rich phase outlet pipe 6; the tangential inlet water inlet pipe 1 is arranged outside the cyclone cavity 5; the overflow pipe 7 is arranged in the middle of the top of the hydraulic separation area 17; the overflow port 8 is arranged at the outlet of the overflow pipe 7; and an air duct 15 is connected to the upper surface of the integrated device for treating sewage by hydraulic collaborative flotation.
The working principle of the invention is briefly described as follows:
as shown in fig. 1, the sewage containing solid particles with various particle sizes is pressurized by a water pump and then enters a hydraulic separation zone 17 through a tangential inlet water inlet pipe 1, and the wastewater enters a cyclone cavity 2 and then runs in a cyclone manner along a cyclone cylinder 3 under the action of gravity and centrifugal tangential force to perform solid-liquid cyclone separation, so that the sewage containing suspended solid particles is separated into a solid-rich phase and a liquid phase; the solid-rich phase is discharged from a solid-rich phase outlet pipe 6 at the bottom of the hydraulic separation area, and the discharged solid-rich phase sludge is concentrated and recycled; the liquid phase overflows from an overflow pipe 7 in the hydraulic separation area 17 and then enters a flotation area 16; through the flotation, the suspended and floating organic pollutants with the density similar to or smaller than that of water in the liquid phase are released by a releaser 9 in a bearing tray 10 to blow off volatile substances in water, and the floated organic pollutants enter a scum area 11 through a guide plate 12 and then are discharged out of scum through an oil overflow weir 13; the purified liquid after flotation is finally discharged outside from the effluent weir 14; the volatile substances in the water are discharged from the vent pipe 15.
For pollutants which are not easy to settle and coalesce in liquid, a targeted aggregating agent is added, so that the mixing, flocculation, coalescence or settlement of the pollutants can be promoted, and the primary solid-liquid separation process of the sewage can be effectively improved.
The integrated device for treating sewage by hydraulic collaborative flotation has the appearance of a cylinder, water is fed into the middle part of the device, and water is discharged from the upper part of the device; and a plurality of devices can be selected to be used in series or in parallel according to the quality of the sewage so as to improve the efficiency of solid-liquid separation.
The embodiment has the following functions and effects:
the integrated device for treating sewage by hydraulic collaborative flotation integrates hydraulic separation and flotation, makes full use of respective action and characteristics of hydraulic separation and flotation, effectively combines hydraulic separation and flotation, and realizes effective removal of solid particles with different properties and different particle size ranges. Firstly, in the hydraulic separation area, the characteristics of a water body and a device are utilized, and the large granular substances in water can be effectively removed through the action of the gravity of the water body and hydraulic centrifugation; then, in a flotation zone, fine particles and dispersed oil in water are effectively separated by utilizing bubble flotation; aiming at substances such as flower oil and the like which are contained in water and are difficult to remove, the substances can be removed by adding an aggregating agent at a water inlet and then performing hydraulic separation and flotation again.
The device can effectively separate different types of oil substances and solid particles with different particle size ranges in water, and has strong adaptability to different types of inflow water quality, low inflow requirement, low energy consumption and small occupied area. In the later operation and maintenance process, the manual operation is simple, and a large amount of manpower and material resources are not required to be input.
Example 2
According to the integrated device and the method for treating sewage by hydraulic collaborative flotation provided by the embodiment, according to the screening principle when solid particles in fluid rotate in a desander, the hydraulic separation and the gas flotation technology are integrated, and through the synergistic effect of the hydraulic separation and the gas flotation technology, the effects of sand removal, turbidity reduction, solid-liquid separation and the like in the field of water treatment are obvious. In addition, the invention provides an integrated device for treating sewage by hydraulic collaborative flotationThe method has low cost, stable treatment effect, reliable operation and 95 percent of solid-liquid separation efficiency; when the COD of the water quality of the inlet water is designed to be less than or equal to 400mg/L and BOD5Less than or equal to 180 mg/L and less than or equal to 220mg/L of SS, and the COD and BOD of effluent water quality are less than or equal to 320mg/L and are continuously tested5Less than or equal to 144mg/L, less than or equal to 10mg/L of SS, stable treatment effect, stable COD removal efficiency of 60-80 percent, automatic control, simple and convenient operation, convenient transportation, high treatment speed and low energy consumption.
The description and application of the present invention is illustrative, but is not intended to limit the scope of the invention to the embodiments described above. It will be understood by those skilled in the art that various modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention.
Claims (4)
1. The utility model provides an integrated device of water conservancy flotation processing sewage which characterized in that:
the device consists of a hydraulic separation area (17) and a flotation area (16), wherein the flotation area (16) is positioned at the upper part of the hydraulic separation area (17);
the hydraulic separation area (17) comprises a tangential inlet water inlet pipe (1), a cyclone cavity (2), a cyclone cylinder body (3), an overflow pipe (7), a sand collection area (4), a mud valve (5), a solid-rich phase outlet pipe (6) and an overflow port (8) from top to bottom; the cyclone cavity (2) is arranged at the upper part of the hydraulic separation area (17); the cyclone cylinder (3) is arranged at the lower part of the hydraulic separation area (17); the bottom of the cyclone cylinder (3) is connected with a solid-rich phase outlet pipe (6); the tangential inlet water inlet pipe (1) is arranged outside the rotational flow cavity (2) and is tightly connected with the rotational flow cavity (2); the overflow pipe (7) is arranged in the middle of the top of the hydraulic separation area (17); the overflow port (8) is arranged at the outlet of the overflow pipe (7) and is positioned at the bottom of the flotation area (16);
the flotation area (16) comprises a bearing tray (10), a releaser (9) and a scum area (11) from bottom to top; the releaser (9) is arranged in the bearing tray (10); the scum area (11) is provided with a guide plate (12) and an oil overflow weir (13) for collecting scum; the outer ring of the scum zone (11) is provided with an effluent weir (14) for discharging purified water; the top of the scum area (11) is provided with an air duct (15);
the sewage containing solid particles enters a hydraulic separation area (17) through a tangential inlet water inlet pipe (1) after being pressurized by a water pump, and the sewage containing suspended solid particles is separated into a solid-rich phase and a liquid phase through a liquid-solid cyclone separation process; the solid-rich phase is discharged from a solid-rich phase outlet pipe at the bottom of the hydraulic separation area (17), and the discharged solid-rich phase sludge is concentrated and recycled; the liquid phase overflows from the overflow pipe (7) and then enters a flotation area (16); the liquid phase overflows from an overflow pipe in the hydraulic separation zone (17) and then enters a flotation zone (16), suspended and floating solid particles with density smaller than that of water in the liquid phase are floated out under the action of a releaser (9), and volatile substances in water are blown out through dissolved air; the floated organic pollutants enter a scum area (11) through a guide plate (12), and then scum is discharged through an oil overflow weir (13); the purified liquid after flotation is finally discharged outside through an effluent weir (14); volatile substances in the water are discharged from the ventilation pipeline (15).
2. The integrated apparatus for sewage treatment by hydraulic collaborative flotation according to claim 1, wherein: the sewage containing solid particles and the aggregating agent enter the cyclone separator together, and the aggregating agent and the solid particles are effectively reacted and combined, so that the removal efficiency of the solid particles in the water is improved.
3. The integrated device for sewage water treatment by hydraulic collaborative flotation according to claim 1, is characterized by comprising: the device appearance is the cylinder, and the middle part is intake, and upper portion goes out water.
4. The integrated device for sewage treatment by hydraulic collaborative flotation according to any one of claims 1 to 3, characterized by further comprising: the device is characterized in that a plurality of devices are connected in series or in parallel for use according to the condition of the sewage quality.
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| CN108708209A (en) * | 2018-08-03 | 2018-10-26 | 联盛纸业（龙海）有限公司 | A kind of paper fiber desanding retracting device |
| CN109647239B (en) * | 2019-01-24 | 2023-10-24 | 中建环能科技股份有限公司 | Hydraulic mixing device |
| CN110759427A (en) * | 2019-11-29 | 2020-02-07 | 中明科学仪器设备(苏州)股份有限公司 | Multiphase separator for sewage treatment |
| CN111003832A (en) * | 2019-12-31 | 2020-04-14 | 湖南景翌湘台环保高新技术开发有限公司 | Pretreatment equipment and method for oil stain and SS in polishing solution wastewater |
| CN111003831B (en) * | 2019-12-31 | 2023-10-27 | 湖南景翌湘台环保高新技术开发有限公司 | Pretreatment equipment and method for oil stains and SS in grinding wastewater |
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